Sample rack adapter



FIG. 1 is a perspective view of a sample rack adapter showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a bottom perspective view thereof; and,

FIG. 9 is a perspective view of a sample rack adapter placed in a sample rack which is not part of the claimed design.

The broken lines in the drawings depict environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a sample rack adapter, as shown and described. 